How to Fix a Furnace That Wont Stay Lit

A broken furnace is a hassle to handle. There are several reasons this can happen, but one of the most common is an issue with the burners or relevant parts.

Newer systems don’t use pilot lights to keep the furnace going. Instead, they utilize electronic ignition. If this ignition malfunctions, the burners will not function like they are supposed to.

When your gas furnace is functioning properly, here’s how it should operate:

  • The thermostat informs your furnace to activate.
  • Your furnace’s draft inducer fan turns on to pull fresh air toward your furnace.
  • The gas valve opens to move gas into the pilot burner.
  • An electronic spark ignites the pilot light.
  • The flame sensor informs your furnace that the pilot is burning.
  • The gas valve moves gas to the main burners, which are lit by the pilot light.
  • Your furnace then provides warm air into your residence via ductwork.

If something breaks down during this process, your furnace will shut down for safety purposes. Or it might turn off a few minutes into heating because it’s too warm.

A number of of these problems can be handled on their own, but others need professional assistance. When you are looking for the best furnace repair in Miami, get in touch with our heat Experts at 305-440-1505. We service all brands and our services are supported by a 100% Satisfaction Guarantee for a year.*

Here are a number of the main reasons why your heating isn’t staying lit and what to do about it.

1. Dirty Flame Sensor

Your furnace’s flame sensor is a safety component that informs your furnace when gas is ignited. If the sensor is dirty or damaged, it may work intermittently or not at all. Even if the sensor is working normally, incorrect positioning leaves it unable to sense the flame to begin with. While you could attempt troubleshooting and cleaning this sensor right away, hiring a pro like Service Experts Heating & Air Conditioning will ensure the problem is fixed promptly and correctly.

2. Furnace is Too Hot

Your furnace has built-in safety functions that shut it off if it gets especially hot. One of the most frequent causes is a filthy filter. We recommend inspecting your air filter monthly. If you can’t see light through it, replace it.

3. Thermostat Malfunction

Your thermostat tells your furnace when it should heat your home. When it’s not functioning like it should, your furnace will have trouble keeping your home warm. This can be a battery or electrical malfunction, depending on what type of thermostat you have. We suggest opening your owner’s manual or manufacturer’s website for specific troubleshooting procedures. If you still can’t get yours working, get in touch with our Experts at 305-440-1505. We’ll pinpoint the issue swiftly and can replace your thermostat, if that is required.

Some of these issues, including a dirty flame sensor or an overheated furnace, are due to a lack of proper furnace maintenance. It’s highly beneficial to have this service completed every year, because it could help stop breakdowns, improve your furnace’s energy efficiency and might even make it survive longer.

We Have You In Good Hands When It’s Time for Furnace Replacement

With enough time, your furnace won’t work like it should despite attempts to repair or maintain it. When the time comes, call Service Experts Heating & Air Conditioning and our professional furnace replacement in Miami. We work with some of the best furnace brands, like Lennox®, to offer you affordable, energy-efficient heating options.

When you’re contemplating replacing your furnace, consider taking advantage of our Advantage Program™. Replacing a furnace can be thousands of dollars out of pocket. As an Advantage member, you’ll get a new furnace for just one small monthly fee. There’s no down payment or installation costs, and you get to keep any helpful rebates.

What’s even better is that Advantage members don’t pay a cent for repairs** or maintenance. If disaster hits, you’re supported with 24/7 priority service. You’ll also enjoy discounts, no sneaky charges and lots of other benefits.

Don’t worry about interruptions to your comfort for a second longer. Give Service Experts Heating & Air Conditioning a call at 305-440-1505 to arrange an appointment today. Whether you need repairs or if it’s time for a new furnace, we guarantee your satisfaction.


*Not applicable to the Advantage Program. See your signed Advantage Program agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions. **See your signed Advantage Agreement for details.

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